FDK CORPORATION Patent applications |
Patent application number | Title | Published |
20160141089 | MULTILAYER INDUCTOR - A multilayer inductor providing improved DC superposition characteristics by a permanent magnet that emits a bias magnetic flux, and having a low-loss material as a magnetic body to improve converter conversion efficiency. The multilayer inductor has a plurality of laminated electrically insulating magnetic layers; and laminated conductive patterns, each of the conductive patterns being connected in sequence in the lamination direction forming a spiral coil inside the magnetic layer. An magnetized annular permanent magnet layer emits a magnetic flux whose direction is opposite that of a magnetic flux excited by the coil is between an outer peripheral edge of the inductor and an outer peripheral edge of the coil so as not to overlap an inner peripheral part of the magnet layer with the conductive patterns and so as to block a space between the conductive patterns and the magnet layer, in axial view of the coil. | 05-19-2016 |
20160133904 | SPACER - A spacer in a square shape and includes an upper groove section provided on an upper surface, and a lower groove section provided on a lower surface. The upper groove section includes a first upper groove fittable with a first lower end edge of a first frame of a battery module located on the upper side, and a second upper groove fittable with a second lower end edge of a second frame of the battery module located on the upper side. The lower groove section includes a first lower groove fittable with a first upper end edge of the first frame of the battery module located on the lower side, and a second lower groove fittable with a second upper end edge of the second frame of the battery module located on the lower side. | 05-12-2016 |
20160105045 | POWER SUPPLY DEVICE - A power supply device includes a battery module in which batteries are connected in series; a negative electrode output terminal to which a negative electrode terminal of the battery module is connected; a positive electrode output terminal to which a positive electrode terminal of the battery module and a connection point between predetermined batteries are individually connected through discharging switches; an output voltage detecting circuit for detecting an output voltage; a charging current adjusting circuit for adjusting the charging current of the battery module; thermistors for detecting the state-of-charge of the battery module; and a control device for controlling the charge and discharge of the battery module, wherein the control device includes means for controlling the discharging switches, so that the output voltage is within a specific range, and means for controlling the charging current adjusting circuit on the basis of the state-of-charge of each battery of the battery module. | 04-14-2016 |
20160043646 | POWER SUPPLY - A DC/DC converter | 02-11-2016 |
20150380156 | WINDING COMPONENT - A winding component includes a core that surrounds an outer circumference of a coil and end surfaces of flanges to form a closed magnetic circuit, in which notches through which end portions of the coil are drawn outward are so formed in the flanges that each of the notches extends radially inward from an outer circumferential edge of the corresponding flange, a wall that surrounds each of the notches such that the wall stands axially outward on the flange, a thick portion in a winding part in correspondence with the notches and thicker than other portions of the winding part, and a lid formed of a sidewall between an outer circumferential surface of the wall and the core and covers the outer circumferential surface of the wall and a top plate at an axially outer end of the sidewall and covers an opening in the wall. | 12-31-2015 |
20150326041 | BALANCING DEVICE AND ELECTRICAL STORAGE DEVICE - There is provided a balancing device that equalizes voltages between storage cells of a battery composed of a plurality of series-connected storage cells or voltages between electrical storage modules composed of a plurality of series-connected storage cells of the battery. The balancing device equalizes voltages between the energy storage modules by transferring electric power between the electrical storage modules through an element to which all of the electrical storage modules are connected, the transferring being realized by on-off control of current supply to each of the electrical storage modules, the on-off control being performed with a first duty cycle. Further, the balancing device introduces a period in which the on-off control is performed with a second duty cycle, the second duty cycle being different from the first duty cycle. Furthermore, the balancing device measures a voltage applied to each of the capacitance elements C | 11-12-2015 |
20150303445 | POSITIVE ELECTRODE LEAD AND ALKALINE SECONDARY BATTERY - A positive electrode lead of the present invention comprises: a strip-shaped first lead half body electrically connected to a sealing body of a nickel-hydrogen secondary battery; a strip-shaped second lead half body electrically connected to a positive electrode of an electrode group of the nickel-hydrogen secondary battery; a PTC thermistor joined between the first lead half body and the second lead half body; and a protective member covering a portion of the positive electrode lead where the PTC thermistor is joined. The second lead half body includes a portion to be bent on the outer side of the portion covered with the protective member. A recessed groove is formed in the portion covered with the protective member and has a shape elongated in a direction intersecting with a bend line of the portion to be bent. | 10-22-2015 |
20150221928 | ALKALINE STORAGE BATTERY - The present invention provides a heat suppressing alkaline storage battery including a positive electrode lead having a downsized portion that incorporates a PTC thermistor. A battery includes a positive electrode lead having a first lead half body, a second lead half body, and a PTC thermistor, the first and second lead half bodies overlap end portions formed in a portion where the first and second lead half bodies overlap with each other, the overlap end portions being larger than the PTC thermistor as viewed from a plane and being in contact with the PTC thermistor, the PTC thermistor is fitted in a fitting recessed portion formed in the overlap end portion of the first lead half body, and an exposed portion of the PTC thermistor is covered with a protective material. | 08-06-2015 |
20140253273 | COMMON-MODE CHOKE COIL - A common mode choke coil includes a quadrilateral core | 09-11-2014 |
20140183959 | UNINTERRUPTIBLE POWER SUPPLY - An uninterruptible power supply is having a battery, a power inverter circuit for inverting the electrical power of the battery, and a voltage control circuit. The voltage control circuit controls the power inverter circuit, so that the output voltage of the power inverter circuit is maintained at a standby voltage lower than a rated voltage under the condition of a power failure detection signal being not output from an external power supply and the output voltage of the power inverter circuit equals the rated voltage under the condition of the power failure detection signal being output from the external power supply. | 07-03-2014 |
20140176067 | Contactless Rechargeable Secondary Battery and Contactless Battery Charger - A contactless rechargeable alkaline secondary battery includes an alkaline secondary battery; a power receiver circuit having receiver coils and a resonance capacitor and adapted to receive AC power via magnetic field resonance, the resonance capacitor connected with the receiver coils L | 06-26-2014 |
20140077119 | ALKALI NIOBATE-BASED PIEZOELECTRIC MATERIAL AND A METHOD FOR MAKING THE SAME - An alkali niobate-based piezoelectric material having the general formula {(K | 03-20-2014 |
20130314072 | POLARITY DETECTION CIRCUIT - The polarity detection circuit includes a first diode with anode receiving a first phase of the AC power supply voltage and a second diode with anode receiving a second phase, opposite the first phase. The detection circuit further includes a constant-voltage power supply outputting a positive constant voltage. A first reference-voltage output circuit outputs a voltage corresponding to the constant voltage when the AC voltage of the first phase is positive, and outputs a voltage at a cathode of the second diode when the AC voltage of the first phase is negative. The detection circuit also includes a first signal output circuit that compares a first voltage, corresponding to a voltage at the cathode of the first diode, and a voltage output from the first reference-voltage output circuit and that outputs a signal indicative of polarity of the AC voltage having the first phase according to a comparison result. | 11-28-2013 |
20130120910 | POWER STORAGE MODULE - An energy storage module | 05-16-2013 |
20130120824 | REFLECTION TYPE VARIABLE OPTICAL ATTENUATOR - An input/output port, a birefringent element, variable polarization rotator, and a reflector are arranged along an optical axis in the order named. The variable polarization rotator includes permanent magnets for applying a fixed magnetic field to a Faraday rotator in an in-plane direction to magnetically saturate the Faraday rotator and a solenoid coil for applying a variable magnetic field to the Faraday rotator in a direction of the optical axis. A fixed magnetic field is applied in the <211> direction, in which the Faraday rotator is likely to be magnetically saturated. The Faraday rotator can be saturated with a low magnetic field of about 100 Oe. The permanent magnets may employ ferrite permanent magnets, which have weak magnetic forces. A variable magnetic field may also be reduced. Therefore, an air-core coil can be used. | 05-16-2013 |
20110109270 | INTER-MODULE VOLTAGE BALANCE CORRECTING CIRCUIT OF A POWER STORAGE SYSTEM - Provided is an inter-module voltage balance correcting circuit of a power storage system including a plurality of storage modules connected in series, each of the storage modules including a plurality of storage cells connected in series. The inter-module voltage balance correcting circuit includes a resistance voltage dividing circuit (R | 05-12-2011 |
20110084668 | ELECTRICITY STORAGE SYSTEM HAVING A PLURALITY OF SERIES-CONNECTED STORAGE CELLS - An electricity storage system includes a plurality of storage modules connected in series, each storage module including a single storage cell or a plurality of storage cells connected in series, an isolation transformer and a rectifying circuit that are associated with each of the storage modules, the isolation transformer having a primary winding and a secondary winding, and a voltage balancing circuit that generates an alternating current by switching a direct-current power source, the primary windings of the isolation transformers being all connected in parallel and connected to an output end of the voltage balancing circuit by a common wiring, the secondary windings of the isolation transformers being connected to the corresponding storage modules via the respective rectifying circuits, the alternating current being supplied to the primary winding of each of the isolation transformers. | 04-14-2011 |
20090302988 | Winding Component - To realize a structure that is substantially highly reliable, that solves a problem of a wire break accompanied by an application of an external force to a terminal and at the same time solves a problem of a wire break caused by heat effects during dip soldering, without causing a strength reduction of the terminal, cost increase, and wire thinning. | 12-10-2009 |
20090278496 | SERIES-CONNECTED RECHARGEABLE CELLS, SERIES-CONNECTED RECHARGEABLE CELL DEVICE, VOLTAGE-BALANCE CORRECTING CIRCUIT FOR SERIES-CONNECTED CELLS - [Object] There is provided series-connected rechargeable cells in which a large number of cells are series-connected and that makes it possible to improve performance on operations such as assembly or exchange and to perform speedy and smooth voltage-balance correcting for all cells. | 11-12-2009 |
20080218841 | Magneto-Optical Device and Manufacturing Method thereof - Magneto-optical crystals of each pixel of a magneto-optical device are magnetically and completely separated, and the entire surface thereof is flattened. | 09-11-2008 |